Home / 31,540.13-47,310.20-12,830.34

Finding the Fourth Proportional to 31,540.13, 47,310.20 and 12,830.34

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Solution

The fourth proportional to 31,540.13, 47,310.20 and 12,830.34 is: 19,245.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.13 : 47,310.20 = 12,830.34 : x
  2. Step 2: Convert to fraction form
    31,540.13/47,310.20 = 12,830.34/x
  3. Step 3: Cross multiply
    31,540.13x = 47,310.20 × 12,830.34
  4. Step 4: Simplify right side
    31,540.13x = 607,005,887.32
  5. Step 5: Solve for x
    x = 607,005,887.32/31,540.13
  6. Step 6: Final answer
    x = 19,245.51

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.